A light-year is the distance that light travels in a vacuum in one Julian year (365.25 days). It's a unit of astronomical distance.

This is because a light-year represents an enormous distance, while 50,000 yards is a relatively small distance on Earth. The number becomes extremely close to zero.

There are 1,760 yards in one mile.

Light-years are used by astronomers to measure the vast distances between celestial objects like stars, galaxies, and other astronomical bodies.